$OpenBSD: patch-IlmCtl_CtlInterpreter_cpp,v 1.1.1.1 2009/11/12 12:31:44 jasper Exp $
--- IlmCtl/CtlInterpreter.cpp.orig	Sun Oct 18 16:20:30 2009
+++ IlmCtl/CtlInterpreter.cpp	Sun Oct 18 16:20:55 2009
@@ -64,6 +64,7 @@
 #include <fstream>
 #include <algorithm>
 #include <cassert>
+#include <unistd.h>
 
 #ifdef WIN32
     #include <io.h>
